LST300 Compact ultrasonic level transmitter Data sheet DS/LST300–EN Rev. A Features — 2-wire instrument with HART digital communication — Up to 10 m measurement range — Wide temperature range of -40 to 85 ˚C — Accuracy of ±2 mm or 0.2 % of full span (the larger one) — Beam angle as low as 5˚ with false echo filtering for narrow spaces — Easy installation with graphic echo display, advanced diagnostic and easy setup menu — Unique GAP technology ensures the best performance under any condition — IP66/67 and NEMA 4X (can submerge to 1 m depth for 30 minutes) — ATEX, IEC & FM Intrinsic safe and non sparking approved The most powerful ultrasonic level transmitter in a compact form Measurement made easy
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LST300Compact ultrasonic level transmitter
Data sheet DS/LST300–EN Rev. A
Features— 2-wire instrument with HART digital communication— Up to 10 m measurement range— Wide temperature range of -40 to 85 ˚C— Accuracy of ±2 mm or 0.2 % of full span (the larger one)— Beam angle as low as 5˚ with false echo filtering for narrow
spaces— Easy installation with graphic echo display, advanced
diagnostic and easy setup menu— Unique GAP technology ensures the best performance
under any condition— IP66/67 and NEMA 4X (can submerge to 1 m depth for 30
minutes)— ATEX, IEC & FM Intrinsic safe and non sparking approved
The most powerful ultrasonic level transmitter in a compact form
LST300 ultrasonic level transmitterThe perfect fit for all water and waste water applications
Chemical storage— Made from metal and PVDF, LST300 is resistant to
corrosion, even if the whole instrument gets in contact with chemicals.
— LST300 automatically adapts to process conditions using unique GAP technology. It’s the only product that simply works even in the presence of some vapor.
Storage, lagoons & settling ponds— Easy setup of functional level measurement using the quick
start menu— Familiar and easy-to-learn menu structure for anyone who
has used other ABB instruments— Direct interaction with the instrument without opening the
front window cover, using ABB’s innovative and unique Through The Glass (TTG) technology
Process basins including aeration, chlorine contact, skimmer tanks, sedimentation and flotation thickeners— With advanced diagnostic functions
such as detailed signal quality tracking and noise level diagnostics, LST300 replaces remote instruments as the most easy-to-install level transmitter.
— Works easily in the presence of turbulence and foam using unique GAP technology.
Irrigation, plant inlet and final discharge— The built-in equations and supporting
software for open channel flow saves you from doing the math manually.
— Class leading 2 mm accuracy with temperature compensation ensures accuracy at all temperature ranges.
— Totalizer counts up to 10 million, keeping accurate track of the total flow over the device lifetime or the flow over an interval for your channel.
Wet wells, lift stations and pumping stations— Immune to noise caused by the
presence of heavy equipment like variable speed drives, LST300 is the perfect choice in pumping stations.
— Market leading beam angle of 5˚ ensures easy installation and effective operation in narrow spaces.
— LST300 false echo filtering algorithm filters false echoes from agitators or submerged pumps in direct sight of the instrument.
— The entire LST300 is submersible in water, thus it can survive the flooding conditions.
LST300 produced by evolutionDiscover all the innovative features
The most powerful ultrasonic level transmitter in compact formLST300 is the most powerful compact ultrasonic level instrument in the market, which removed many limitations that existed before.
Most ultrasonic level transmitters have serious limitations, forcing you to compromise on accuracy, power consumption, ingress protection, chemical resistance, HMI capabilities and measurement range. LST300 changed this, as the first product that provides all the benefits of the most advanced technology without the need to compromise.
The world’s first compact ultrasonic instrument designed for the industrial environmentThe IP66/67 rated (as standard) LST300 easily survives tough outdoor environment and can be fully submerged in flood conditions. Many other devices in the market only provide high IP ratings on the sensor (wetted parts), while their main electronics have only IP65 protection. However, LST300 is an integrated, yet fully protected device and its IP rating applies to the whole of the instrument. IP68 is a special degree of protection, and can be tested on special request for your special requirements.
Metal at the top, and PVDF at the bottom. LST300 is the first instrument that can be installed in the rough, corrosive conditions where only remote sensor instruments were previously used. All other compact ultrasonic instruments provide corrosion resistance only on the sensor, and require you to separate the transmitter from the environment.
Class leading accuracyThe leading 2 mm accuracy of LST300 includes temperature compensation to ensure accuracy at all temperature ranges. The sonic speed changes when the temperature changes. LST300 measures temperature and automatically compensates for a change of conditions. Easy-to-use two point calibration helps you to quickly get the best possible accuracy in your application. Calibrate the measurement to two known points and make sure you get the most out of your instrument. There is no need of complicated calibration procedures to achieve the optimal performance.
Easy installation and configurationConfiguration is easy with the quick start menu where LST300 guides you through the most important steps to set up a functional level measurement. The familiar menu structure is easy to use for anyone who has used other ABB instruments before, drastically reducing the learning curve when moving to the new device.
LST300 is the first to have full graphic capability and allows you to visualize the process on the instrument, while other compact instruments have simple character display systems only. Detailed tracking of signal quality, noise levels and many other important diagnostics make LST300 the easiest level transmitter to install.
LST300 is also unique with its Through The Glass (TTG) buttons. This exclusive and innovative option enables direct interaction with the instrument without opening the front window cover. This means you can maintain ingress protection rating of IP67 even during configuration. Protection against splashes during configuration is just another way that LST300 makes installation easier.
LST300 produced by evolutionDiscover all the innovative features
Measure in the most constrained spacesLST300 has a beam angle of as low as only 5˚ full angle (or only 2.5˚ half angle), which means the measurement is much more directional than most instruments in the market. Easily aim the instrument at the target and watch as it avoids all obstructions. This allows LST300 to measure effectively in narrow spaces, not even requiring false echo filtering for obstructions outside the 5˚ window.
LST300 contains a false echo filtering algorithm, which allows you to easily inform the instrument which echoes to ignore. It’s no problem for LST300 even in case of obstructions within the 5˚ space. This function is especially useful in applications with agitators or submerged pumps.
Automatically adapts to process conditions using GAP unique technologyLST300 contains an improved version of the already powerful GAP technology found in LST400. The LST300 constantly monitors measurement data and optimizes the system for the best signal to noise at any tank size. This function ensures the LST300 always runs at the highest accuracy. LST300 is easy to install in both small areas like stilling wells, and large tanks in difficult conditions.
Non-Contact measurement means no maintenanceAs is the case with all the other ABB ultrasonic and laser level instruments, there are no moving parts, so nothing ever wears out. LST300 is a maintenance-free device that delivers the highest level of reliability throughout its operational life.The advanced sensor design has leading beam angle and sensitivity which also results in the most reliable level instrument. LST300 never lets you down during changing seasons, humidity conditions and even flooding.
DimensionsLength: 136 mm (5.3”)Width: 100 mm (3.9”) (excluding glands)Height: 266 mm (10.4”)
Weight2 kg (4.4 lbs)
Cable entry typeTwo options:1/2 in. threaded bore for cable gland, directly on housing:Supplied with 1 x 1/2 in. NPT cable glandM20 x 1.5 threaded bore for cable gland, directly on housing:Supplied with M20 x 1.5 cable gland
Electrical Data
TerminalsThree connections for wire cross sections of up to 2.5 mm2 (14 AWG) as connection points for power supply and communication purposes
GroundingInternal and external ground terminals are provided for 6 mm2 (10 AWG) wire cross sections
Power supplyThe transmitter operates from 16 to 42 V DC with no load and is protected against reversed polarity (additional loads enable operation above 42 V DC).During use in Exia zones and in other intrinsically safe applications, the power supply must not exceed 30 V DC.
RippleMax. 2.2 mV RMS over a 500 Ω load as per HART specifications
Load limitationsTotal measurement circuit resistance at 4 to 20 mA and HART:
A minimum resistance of 250 Ω is required for HART communication.
Analog outputTwo-Wire output: 4 to 20 mA related to level / volume / flow, full compensation for temperature effects
Displays (Optional)
Integrated LCD display (code L7)Widescreen LCD display, 128 x 64 pixels, 52.5 x 27.2 mm (2.06 x 1.07 in.) dot matrixFour keys for device configuration and managementEasy setup for quick commissioningCustomized visualizations which users can selectTotalized and actual value flow indicationTemperature and diagnostics message display, and configuration settings
Integrated LCD display with TTG operation (code L2)Same specifications as the integrated LCD display (code L7)An innovative Through-The-Glass (TTG) keypad which can be used to activate the device configuration and management menus without having to remove the transmitter housing coverTTG keys protected against accidental activation
R(kΩ) =Voltage supply - Minimum operating voltage (V DC)
22 mA
LST300Ultrasonic level transmitter
Hazardous Area Approvals
cFMusIntrinsic Safety type of protection:Approval according to FM US and Canada IS Class 1 Div 1/GP ABCD- CL II/ DIV 1/ GP EFG, Zone 0 AEx/Ex ia IIC T6...T4 IS Control Drawing number: 3KXL065035U0009
Non Incendive type of protection:Approval according to FM US and Canada NI Class 1 Div 2/GP ABCD- DIP CL II/ DIV 2/ GP EFG, Zone 2, AEx/Ex nA IIC T6…T4
ATEX/IECExIntrinsic Safety type of protection:II 1 G Ex ia IIC T6...T4 Ga - II 1 D Ex ia IIIC T85° CFor electrical parameters, refer to cert, FM15ATEX0063XEx ia IIC T6...T4 Ga - Ex ia IIIC T85° CFor electrical parameters, refer to cert, IECEx FME 15.0010X
Non Incendive type of protection:II 3 G Ex nA IIC T6...T4 Gc - II 3 D Ex tc IIIC T85°CFor electrical parameters, refer to cert, FM15ATEX0064XEx nA IIC T6...T4 Gc - Ex tc IIIC T85°CFor electrical parameters, refer to cert, IECEx FME 15.0010X
NEPSIIntrinsic Safety type of protection:Ex ia IIC T6...T4 Ga - Ex iaD 20 T85° CFor electrical parameters, refer to cert, GYJXXXXXX
Non Incendive type of protection:Ex nA IIC T6...T4 Gc - DIP A22 TA85°CFor electrical parameters, refer to cert, GYJXX.XXXX
Environmental Data
Electromagnetic compatibility (EMC)Meets requirements of EN 61326Overvoltage strength (with surge protection): 2 kV (according to IEC 61000-4-5)
Temperature-40 to 85 °C (-40 to 185 °F), according to EN 60068-2-14, 1 K/min, 100 cycles
HumidityRelative humidity: Up to 100 %Condensation, icing: Not permissible
PressureMeasurement functional from -4 to 44 psi (-0.25 to 3.0 bar)
Vibration resistanceAcceleration up to 1 g at frequencies of up to 2,000 Hz (according to EN 60068-2-64)
Climate classDIN EN 60068-2-38 (Test Z/AD) DIN/IEC 68 T2-30Db
NoteWe reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreedparticulars shall prevail. ABB does not accept any responsibility whatsoever for potential errors or possible lack of information in this document.
We reserve all rights in this document and in the subject matter and illustrations contained therein. Any reproduction, disclosure to third parties or utilization of its contents – in whole or in parts – is forbidden without prior written consent of ABB.